Merge pull request #2668 from searx/dependabot/pip/master/pycodestyle-2.7.0

Bump pycodestyle from 2.6.0 to 2.7.0

requirements-dev.txt

@@ -1,7 +1,7 @@
 mock==4.0.3
 nose2[coverage_plugin]==0.10.0
 cov-core==1.15.0
-pycodestyle==2.6.0
+pycodestyle==2.7.0
 pylint==2.7.4
 splinter==0.14.0
 transifex-client==0.14.2